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Finding the Fourth Proportional to 17,124.80, 25,663.20 and 13,620.80

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Solution

The fourth proportional to 17,124.80, 25,663.20 and 13,620.80 is: 20,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,124.80 : 25,663.20 = 13,620.80 : x
  2. Step 2: Convert to fraction form
    17,124.80/25,663.20 = 13,620.80/x
  3. Step 3: Cross multiply
    17,124.80x = 25,663.20 × 13,620.80
  4. Step 4: Simplify right side
    17,124.80x = 349,553,314.56
  5. Step 5: Solve for x
    x = 349,553,314.56/17,124.80
  6. Step 6: Final answer
    x = 20,412.11

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.